An element A belongs to third period and fifteenth group of the periodic table. Which one of the following is true regarding the outer electronic configuration of A?
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a
It has completely filled s-orbital and p-orbital
b
It has partially filled d-orbitals and completely filled s-orbital
c
It has half filled d-orbitals and completely filled s-orbitals
d
It has completely filled s-orbital and half-filled p-orbitals
answer is D.
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Detailed Solution
The element A may be phosphorus (P) and its electronic configuration isA(P)=1s2,2s22p6,3s23p3So, element 'A' has completely filled s-orbital and half-filled p-orbitals.